Arithmetic and control unit



FIG. 1 is a perspective view of a first embodiment of an arithmetic andcontrol unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

FIG. 8 is a perspective view of a second embodiment of an arithmetic andcontrol unit showing my new design;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevation view thereof;

FIG. 11 is a left side elevational view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a top plan view thereof; and

FIG. 14 is a bottom plan view thereof.

FIG. 15 is a perspective view of a third embodiment of an arithmetic andcontrol unit showing my new design;

FIG. 16 is a front elevational view thereof;

FIG. 17 is a rear elevation view thereof;

FIG. 18 is a left side elevational view thereof;

FIG. 19 is a right side elevational view thereof;

FIG. 20 is a top plan view thereof; and,

FIG. 21 is a bottom plan view thereof.

The broken lines represent various portions of the design and form nopart of the claim. The dot-dash broken lines represent the boundaries ofthe design. None of the broken lines form any part of the claimeddesign.

The ornamental design for an arithmetic and control unit, as shown anddescribed.